TPSMB33AHM3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMB33AHM3_A/I is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the PAR® series and is designed for transient voltage protection in telecom applications. The device features a 28.2V reverse standoff voltage with a 45.7V maximum clamping voltage and 13.1A peak pulse current capability. With active product status and AEC-Q101 automotive qualification, this component remains in production. Identifying equivalent substitute parts is necessary to ensure supply chain flexibility, manage inventory across multiple suppliers, and maintain design continuity when primary sources experience allocation constraints.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	28.2	V
Voltage - Breakdown (Min)	31.4	V
Voltage - Clamping (Max) @ Ipp	45.7	V
Current - Peak Pulse (10/1000µs)	13.1	A
Power - Peak Pulse	600	W
Package / Case	DO-214AA, SMB	-
Operating Temperature Range	-65 to 185	°C (TJ)
Qualification	AEC-Q101	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the TPSMB33AHM3_A/I is determined by strict equivalence across the following critical parameters:

Voltage specifications must match exactly: 28.2V reverse standoff voltage, 31.4V minimum breakdown voltage, and 45.7V maximum clamping voltage. These parameters define the protection threshold and are non-negotiable for circuit compatibility.

Current rating must be equal to or greater than 13.1A peak pulse current to ensure adequate transient suppression without component degradation.

Package and mounting type must be identical: DO-214AA surface mount (SMB) configuration. This ensures mechanical and electrical compatibility with existing PCB layouts.

Compliance certifications must include AEC-Q101 automotive qualification and ROHS3 compliance to maintain design integrity and regulatory adherence.

Operating temperature range must support the application environment. The main part operates from -65°C to 185°C; substitute parts must cover this range or be verified for the specific operating conditions of the target application.

The P6SMB33A-AU_R1_000A1 from Panjit International Inc. meets these substitution criteria with matching voltage specifications, equivalent peak pulse current (13.2A), identical package configuration, and equivalent compliance certifications.

Parameter Comparison

Parameter	TPSMB33AHM3_A/I (Vishay)	P6SMB33A-AU_R1_000A1 (Panjit)	Match Status
Voltage - Reverse Standoff (Typ)	28.2V	28.2V	Exact Match
Voltage - Breakdown (Min)	31.4V	31.4V	Exact Match
Voltage - Clamping (Max) @ Ipp	45.7V	45.7V	Exact Match
Current - Peak Pulse (10/1000µs)	13.1A	13.2A	Equivalent
Power - Peak Pulse	600W	600W	Exact Match
Package / Case	DO-214AA, SMB	DO-214AA, SMB	Exact Match
Mounting Type	Surface Mount	Surface Mount	Exact Match
Grade	Automotive	Automotive	Exact Match
Qualification	AEC-Q101	AEC-Q101	Exact Match
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Exact Match
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Exact Match
Operating Temperature Range	-65 to 185°C (TJ)	-55 to 150°C (TJ)	Partial - Panjit has narrower range

Engineering Selection Recommendations

The P6SMB33A-AU_R1_000A1 qualifies as a direct substitute for the TPSMB33AHM3_A/I based on electrical parameter equivalence and compliance certification alignment. Both components carry AEC-Q101 automotive qualification and ROHS3 compliance status, ensuring regulatory and quality standards are maintained.

The primary consideration is the operating temperature range differential. The Vishay component operates across -65°C to 185°C, while the Panjit substitute operates across -55°C to 150°C. For applications operating within the Panjit range (-55°C to 150°C), the substitute provides full functional equivalence. For applications requiring the extended lower temperature performance (-65°C) or higher temperature performance (above 150°C), the Vishay component remains the specified choice.

Both components are active products with established supply availability. Selection between them should be based on supply chain requirements, cost considerations, and the specific operating temperature envelope of the target application.

Frequently Asked Questions (FAQ)

Q: Can the P6SMB33A-AU_R1_000A1 be used as a direct replacement for the TPSMB33AHM3_A/I in all applications?

A: The P6SMB33A-AU_R1_000A1 is electrically equivalent for voltage and current specifications. However, verify that your application operates within the Panjit component's temperature range of -55°C to 150°C. If your design requires operation below -55°C or above 150°C, the Vishay component is required.

Q: Are there any package or mounting differences between these parts?

A: No. Both components use identical DO-214AA surface mount (SMB) packaging. PCB layouts, footprints, and reflow profiles are interchangeable.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the TPSMB33AHM3_A/I and P6SMB33A-AU_R1_000A1 carry AEC-Q101 automotive qualification and are ROHS3 compliant.

Q: What is the difference in peak pulse current between these parts?

A: The Vishay component is rated at 13.1A peak pulse current, while the Panjit component is rated at 13.2A. This 0.1A difference is negligible for circuit protection purposes and does not affect substitution eligibility.

Q: Are moisture sensitivity levels the same?

A: Yes. Both components have MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

Q: Which part should I specify for new designs?

A: Selection depends on supply availability and application temperature requirements. For designs requiring the full -65°C to 185°C operating range, specify the TPSMB33AHM3_A/I. For applications within -55°C to 150°C, either part is acceptable based on supply chain considerations.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message